#! /bin/sh

set -e

_systemctl() {
    if [ -d /run/systemd/system ]; then
        systemctl "$@"
    fi
}

_update_catalog() {
    journalctl --update-catalog || true
}

# Update Message Catalogs database and reload in response to dpkg triggers
if [ "$1" = "triggered" ]; then
    shift
    for trigger in "$@"; do
        case $trigger in
            /usr/lib/systemd/catalog)
                _update_catalog
                ;;
            /etc/init.d)
                _systemctl daemon-reload || true
                ;;
        esac
    done
    exit 0
fi

# Enable getty and remote-fs.target by default on new installs
if [ -z "$2" ]; then
    systemctl enable getty@tty1.service || true
    systemctl enable remote-fs.target || true
fi

# Enable timesyncd by default on new installs installs and upgrades
if dpkg --compare-versions "$2" lt "218-11~"; then
    systemctl enable systemd-timesyncd.service || true
fi

# Enable ondemand by default on new installs installs and upgrades
if [ -e /lib/systemd/system/ondemand.service ] && dpkg --compare-versions "$2" lt "231-7~"; then
    systemctl enable ondemand.service || true
fi

# Do a one-time migration of the local time setting
if [ -z "$2" ]; then
    if [ -f /etc/default/rcS ]; then
        . /etc/default/rcS
    fi
    if [ "$UTC" = "no" ] && [ ! -e /etc/adjtime ]; then
        printf "0.0 0 0.0\n0\nLOCAL\n" > /etc/adjtime
    fi
fi

# Do a one-time migration of the TMPTIME setting
if [ -z "$2" ]; then
    if [ -f /etc/default/rcS ]; then
        . /etc/default/rcS
    fi
    if [ ! -e /etc/tmpfiles.d/tmp.conf ]; then
        case "$TMPTIME" in
            -*|infinite|infinity)
                cat > /etc/tmpfiles.d/tmp.conf <<EOF
# Avoid clearing /tmp by shipping an empty /etc/tmpfiles.d/tmp.conf file
# which overrides /usr/lib/tmpfiles.d/tmp.conf.
# This file was automatically created because of local modifications in
# /etc/default/rcS where TMPTIME was set to infinite.
EOF
                ;;
        esac
    fi
fi

# Do a one-time migration of the RAMTMP setting
if [ -z "$2" ]; then
    if [ -f /etc/default/rcS ]; then
        . /etc/default/rcS
    fi
    if [ -f /etc/default/tmpfs ]; then
        . /etc/default/tmpfs
    fi
    if [ "$RAMTMP" = "yes" ]; then
        # systemctl enable will work even when systemd is not the active PID 1.
        if [ ! -e /etc/systemd/system/tmp.mount ]; then
            cp /usr/share/systemd/tmp.mount /etc/systemd/system/tmp.mount
            systemctl enable tmp.mount || true
        fi
    fi
fi

# Create /etc/machine-id
systemd-machine-id-setup

# Setup system users and groups
addgroup --quiet --system systemd-journal

# We need to stop running services before we call adduser
RESTART=""
if dpkg --compare-versions "$2" lt-nl "239-6"; then
    for s in systemd-networkd systemd-timesyncd systemd-resolved ; do
        if _systemctl -q is-active $s; then
            _systemctl stop $s
            RESTART="$s $RESTART"
        fi
    done
fi

adduser --quiet --system --group --no-create-home --home /run/systemd \
    --gecos "systemd Time Synchronization" systemd-timesync
adduser --quiet --system --group --no-create-home --home /run/systemd \
    --gecos "systemd Network Management" systemd-network
adduser --quiet --system --group --no-create-home --home /run/systemd \
    --gecos "systemd Resolver" systemd-resolve

# Remove old state directory of systemd-timesyncd
if dpkg --compare-versions "$2" lt-nl "240-3~"; then
    if [ -L /var/lib/systemd/timesync ] ; then
        rm /var/lib/systemd/timesync
        rm -rf /var/lib/private/systemd/timesync
    fi
fi

# Initial update of the Message Catalogs database
_update_catalog

if [ -n "$2" ]; then
    _systemctl daemon-reexec || true
    # don't restart logind; this can be done again once this gets implemented:
    # https://github.com/systemd/systemd/issues/1163
    _systemctl try-restart systemd-networkd.service || true
    _systemctl try-restart systemd-resolved.service || true
    _systemctl try-restart systemd-timesyncd.service || true
    _systemctl try-restart systemd-journald.service || true
fi

# Restart services which we stopped earlier
# This needs to run after daemon-rexec
if dpkg --compare-versions "$2" lt-nl "239-6"; then
    for s in $RESTART ; do
        _systemctl start $s
    done
fi

# Cleanup hwclock-save.service, which was shipped in jessie.
if dpkg --compare-versions "$2" lt-nl "228-5~"; then
   for t in reboot halt poweroff ; do
       rm -f /etc/systemd/system/${t}.target.wants/hwclock-save.service
       rmdir --ignore-fail-on-non-empty /etc/systemd/system/${t}.target.wants 2> /dev/null || true
   done
fi

if dpkg --compare-versions "$2" lt-nl "235-3~"; then
    # systemd-bus-proxyd got dropped before stretch, and never created any file
    deluser --system systemd-bus-proxy || true
fi

if dpkg --compare-versions "$2" lt-nl "236-1~"; then
    # Clean up old /var/lib/systemd/clock on upgrade.
    # The clock file used by systemd-timesyncd is now stored in
    # StateDirectory=systemd/timesync.
    rm -f /var/lib/systemd/clock
fi

if dpkg --compare-versions "$2" lt-nl "239-12~"; then
    # clean up bogus "nobody" group from #912525; ensure that it's a system group
    if getent group nobody >/dev/null; then
        delgroup --system nobody || true
    fi
fi

#DEBHELPER#
